CVE-2021-46179: Upx

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.

Affected products

• Upx Upx: before 4.0.0 (fixed in 4.0.0)

Published 2023-08-22. Last modified 2026-06-17.